Depth depth depth!
If you're struggling due to flexibility then fair enough, but if not you really need to be hitting depth on these lighter weights or it will be even harder when you get heavy.
I am on the boundary of tucking there, my flexibility really isn't good. I am working on my depth and flexibility during my lighter sets and 2 nights in the gym now as well as home stuff. If I continue to not have depth I already plan on a strategic Deload on squats.